#include <WiFi.h>
#include <ThingSpeak.h>
#include <DHT.h>

const char* ssid = "YOUR_WIFI_SSID";
const char* password = "YOUR_WIFI_PASSWORD";
const char* apiKey = "YOUR_WRITE_API_KEY";
const long channelId = YOUR_CHANNEL_ID;

const int DHTPin = 5;
const int LEDPin = 4;
const int BuzzerPin = 2; 

DHT dht(DHTPin, DHT11);
WiFiClient client;

void setup() {
  Serial.begin(115200);
  dht.begin(); 
  pinMode(LEDPin, OUTPUT);
  pinMode(BuzzerPin, OUTPUT);

  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  ThingSpeak.begin(client);
}

void loop() {
  float temperature = dht.readTemperature();
  float humidity = dht.readHumidity();

  if (isnan(temperature) || isnan(humidity)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  if (temperature > 30) {
    digitalWrite(LEDPin, HIGH);
    digitalWrite(BuzzerPin, HIGH);
    delay(500);
    digitalWrite(BuzzerPin, LOW);
    delay(500);
  } else {
    digitalWrite(LEDPin, LOW); 
    digitalWrite(BuzzerPin, LOW);
  }

  ThingSpeak.setField(1, temperature);
  ThingSpeak.setField(2, humidity);
  int responseCode = ThingSpeak.writeFields(channelId, apiKey);

  if (responseCode == 200) {
    Serial.println("Data sent to ThingSpeak successfully!");
  } else {
    Serial.print("Error sending data to ThingSpeak. Response code: ");
    Serial.println(responseCode);
  }

  delay(60000); // Update every 60 seconds
}